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www.southgatearc.org
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Car key fobs in WindermereOver a decade ago, a report for the UK radio communications regulator showed that the use of 433.920 MHz for car key fobs would cause problems, but still there is no sign of OFCOM moving them to a better frequency. Recently there has been much coverage in the national newspapers and TV about car doors not opening in Windermere, but the reason for these problems has been known since the 90's. It seems amazing that the regulator OFCOM has not moved key fobs to a more appropriate frequency such as 868 MHz. To reduce costs 433 MHz car key fobs may make use of super-regenerative receivers, unfortunately such receivers can fail if there are other licenced UHF transmitters in the nearby area. The report states that the super-regenerative receiver modules should not be used for any application where a reasonable degree of reliability was required or expected. Read the 1999 report from the Radio Technology & Compatibility Group at Low Power Radio Devices - A Guide for the Purchaser and Systems Designer Independant - Can anyone unlock the mystery of the Windermere Triangle? Telegraph - Drivers mystified by secret of 'Windermere Triangle' Daily Mail - Riddle of the 'Windermere Triangle', where cars mysteriously refuse to unlock BBC Video - Mystery of Windermere street where gadgets go haywire
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